Aspen Aspen trees are found in the northern and western U.S. An aspen leaf is almost round in shape, with a pointy tip and rounded points along its edges. Black locust Black locust trees are found in the eastern U.S. A black locust leaf is made up of many small leaflets. Ginkgo Ginkgo trees are found all over the U.S. A gingko leaf is shaped like a fan. [Extracted from the article]
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